The only state that went full commie, the DPRK, avoided infection even entering their country you dumb liberal.
A mask has to provide some measure of personal protection, it can be low, but it is a physical thing blocking some of the surfaces you can get infected through.
Just because masks are more effective at keeping you from infecting others doesn't mean you discount the absolute material reality.
The majority of people who get infected do so from their household. Shutting down large gatherings is probably the single most effective thing at reducing wide scale transmission because this is far more likely to happen, even with masks, if people are lingering in the same space together over time.
Briefly passing someone in your 50% capacity supermarket is fairly safe, even if you had no mask.
But the mask helps some and there is literally zero reason not to wear one, so even if they provided an overall 5% reduction in transmission in real world situations you are going to wear the fucking mask.